Ddos attack? Please help???

Recently my droplet came under a ddos attack that basically locked me out of my droplet and would not let me view the graph for about 2 hours ( the bandwidth public graph) This graph shows that the ddos attack was 67.3MBps how big was this attack in gigabytes? How can I stop an attack again? But main question how big in gigabytes was this attack?

If you want to cheat the attacker, you need to create a protection like a jail box for your data ... tehnically... in/out only through some shortcuts ... the attack only distroy the shortcuts, not the data and you could bring the in/out routed trough other ip adresses